Add constructors to WebInputEvents and setters so we can work at cleaning up these public structs.

content/common/input/web_touch_event_traits.cc

Index: content/common/input/web_touch_event_traits.cc
diff --git a/content/common/input/web_touch_event_traits.cc b/content/common/input/web_touch_event_traits.cc
index 031d4e10305599a480851553795873c5663ae88a..dbd0630f3a17fa443d6e1a274d7030e377c4f0bd 100644
--- a/content/common/input/web_touch_event_traits.cc
+++ b/content/common/input/web_touch_event_traits.cc
@@ -54,11 +54,11 @@ void WebTouchEventTraits::ResetType(WebInputEvent::Type type,
   DCHECK(WebInputEvent::isTouchEventType(type));
   DCHECK(type != WebInputEvent::TouchScrollStarted);
 
-  event->type = type;
+  event->setType(type);
   event->dispatchType = type == WebInputEvent::TouchCancel
                             ? WebInputEvent::EventNonBlocking
                             : WebInputEvent::Blocking;
-  event->timeStampSeconds = timestamp_sec;
+  event->setTimeStampSeconds(timestamp_sec);
 }
 
 void WebTouchEventTraits::ResetTypeAndTouchStates(WebInputEvent::Type type,